Improvement in furnaces of sugar-evaporators



A. H. PERRY.

Evaporatin'g Pan. v

No. 38,759. Patented June 2. 1863.

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A. H. PERRY, or rrrron, IOWA.

IMPROVEMENT IN FURNACES OF SUGAR-EVAPORATORS.

Specification forming part of Letters Patent No. 38,759, dated June 2,1863.

ToaZZ whom it may concern.-

Be it known that I, A. H. PERRY, of 'Tipton, in the county of Cedar andState of Iowa, have invented anew and useful Improvement in Evaporatorsfor saccharine Liquids, &c.; and I do hereby declare that the followingis a full, clear, and exact description of the same, reference beinghadto the accompanying drawing, forming a part of this specification, inwhich- Figure 1 represents a longitudinal vertical section, the line a:as, Fig, 2, indicating the plane of section. Fig. 2 is a transversevertical section taken in the plane indicated by the line 3 1 Figs. 1and 8. Fig. 3 is a horizontal section of the same, the plane of sectionbeing indicated by the lines .2 .2, Fig. 1

The object of this invention is to use bagasse fresh from thecrushing-rollers as part of the fuel for heating the juice.

The invention consists in the arrangement of a hopper between the firstand second parts communicating at its bottom with a flue through whichthe blaze from the fire inthe furnace passes, said hopper being providedwith a trap-door and with a revolvingand stationary grate in such amanner that the bagasse thrown into the hopper is first dried whilelying on the trap-door in the hopper, where it is exposed to the heatfrom the fire of the furnace, and when dried the bagasse is pitched downupon the revolving grate, where it is set on fire by the blaze fromthefurnace, and the heat under the first pan is thereby considerablyincreased, and the operation of evaporating the juice carried on with aconsiderable saving in fuel.

The invention consists, also, in combining. two furnaces, one to burncoal or wood and to dry the bagasse which serves as fuel for the secondfurnace.

To enable othersskilled in the art to make and use my invention, I willproceed to describeit.

A is a furnace, built up of brick or any other suitable material, forthe purpose of burning wood or coal. The heat from the fire in thisfurnace passes through the flue B to the second furnace,C, and thencethrough the flue D to the chimney E. The second furnace is provided witha revolving grate, F, which revolving grate is situated at the bottom ofa hopper, H, through which bagasse is fed to thesecond furnace. Thehopper is provided with a trap-door, I, which can be raised to ahorizontal position, as shown in Fig. 1, to re vceive the bagasse, andthen turned down to deposit the bagasse on the revolving grateF. Thistrap-door may be operated by hand or automatically, at certainintervals, by some device connecting it with the power giving motion tothe crushing-mill. The bagasse as it comes from the mill is pitched intothe hopper and deposited on the trap-door, whereit is partially dried bythe heat from the fire in the furnace H, and when dry it is dropped downupon the .revolving grate, where, after being completely dried, it isdropped and set on fire on the grate G, and increases the heat, underthe first pan. The juice is conducted through the trough K to the firstpan, L, and after it has been boiled and skimmed it is let down throughthe filter M into the second pan, N, and from this pan into the third orfinishing pan, P. The trough K runs down close on the side of the hopperH, where it is exposed to the heat radiating from the side of thehopper, so that the juice is preliminarily heated in passing throughsaid trough and before it reaches the first pan. The finishingpan P isprovided with a double bottom, and the space between the two bottoms isfilled with water to prevent burning the molasses when finishing. Bycombining the two furnaces A and O the bagasse fed to the second furnaceis set on fire by the heat from the first furnace, and a considerablesaving in fuel is effected. By means of the trapdoor the green bagasseis dried before it is deposited on the revolving grate, and itsefficiency as fuel is thereby increased. The filter, which is situatedbetween the first and second pans, serves to purify the finally boiledjuice, so that the same needs no refining. The position of the severalpans in relation to each other gives perfect control to the operatorover the juice, and the operation of boiling the juice down can becarried on with little labor, with a great saving in fuel,

2 same and without danger of scorching or overheat- 111g.

WhatI claim as new, and desire to secure by Letters Patent, is-

1. The arrangement of the hopper H with a trap-door I and revolvinggrate F, in combination with the flues 13 D leading from the furnace Ato the chimney, the Whole being constructed and operating in the mannerand for the purpose substantial] as described.

2. So combining two furnaces, A and G, and their flues B and D that thefuel in the second furnace is dried and set on fire by the heatemanating from the fuel in the first furnace, substantially as setforth.

A. H. PERRY.

Witnesses:

S. N. FnLLoWs, J. G. SCHAEFF.

